Hi - It's been pointed out that the Samsung Epic 4G Touch may not have another mic opening for the second noise canceling mic. I was curious if this was indeed missing from the Sprint version of the GS2, as the AT&T version looks like it does have one near the headphone jack?

I call outside a lot at work, and I am located near a noisy regional airport, so active noise cancellation is very important.

Samsung post general specs of the GS2; however, it's hard to find all the true differences between all the various model.